add Yun Liu to user list to trigger blossom-ci [skip ci] (#7239)

Fixes # .

### Description

A few sentences describing the changes proposed in this pull request.

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Non-breaking change (fix or new feature that would not break
existing functionality).
- [ ] Breaking change (fix or new feature that would cause existing
functionality to change).
- [ ] New tests added to cover the changes.
- [ ] Integration tests passed locally by running `./runtests.sh -f -u
--net --coverage`.
- [ ] Quick tests passed locally by running `./runtests.sh --quick
--unittests --disttests`.
- [ ] In-line docstrings updated.
- [ ] Documentation updated, tested `make html` command in the `docs/`
folder.


Add new developer to blossom-ci trigger list

Signed-off-by: YanxuanLiu <yanxuanl@nvidia.com>

Author: YanxuanLiu

.github/workflows/blossom-ci.yml

@@ -34,6 +34,7 @@ jobs:
       wyli,\
       pxLi,\
       YanxuanLiu,\
+      KumoLiu,\
       ', format('{0},', github.actor)) && github.event.comment.body == '/build'
     steps:
       - name: Check if comment is issued by authorized person